20868713794 has 4 divisors (see below), whose sum is σ = 31303070694. Its totient is φ = 10434356896.

The previous prime is 20868713777. The next prime is 20868713807. The reversal of 20868713794 is 49731786802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20495644569 + 373069225 = 143163^2 + 19315^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5217178447 + ... + 5217178450.

Almost surely, 2^20868713794 is an apocalyptic number.

20868713794 is a deficient number, since it is larger than the sum of its proper divisors (10434356900).

20868713794 is a wasteful number, since it uses less digits than its factorization.

20868713794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10434356899.

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 20868713794 in words is "twenty billion, eight hundred sixty-eight million, seven hundred thirteen thousand, seven hundred ninety-four".